本题目来源于试卷: Physics Unit6: Work and Energy，类别为 国际高中通用物理
[单选题]
A projectile of mass m lea;,wf8v s(t71irzk va mves the ground wit9j x f6)8aiy homf4zj,h a kinetic energy of 220 J. At the highest point inf,j6a y 4i8hfmzox9j) its trajectory, its kinetic energy is 120 J. To what vertical height, relative to its launch point, did it rise?
A. $\frac{220}{mg} \; m$
B. $\frac{120}{mg} \; m$
C. $\frac{100}{mg} \; m$
D. Impossible to determine without knowing the angle of launch
参考答案: C
本题详细解析:
暂无
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